/Engine/Plugins/VirtualProduction/Takes/Source/TakeTrackRecorders/Public/TrackRecorders/MovieScene3DTransformTrackRecorder.h
Normalized 0-1
float GetU ( const [FFrameNumber](API\Runtime\Core\Misc\FFrameNumber) & Time, const [FFrameNumber](API\Runtime\Core\Misc\FFrameNumber) & PrevKeyTime, const [FFrameNumber](API\Runtime\Core\Misc\FFrameNumber) & NextKeyTime )